## Core Concept
The World Health Organization (WHO) recommends breastfeeding for at least two years or beyond. This duration provides optimal nutrition and boosts the immune system of the child. The recommendation is based on the nutritional and immunological benefits of breast milk.

## Why the Correct Answer is Right
The correct answer, , aligns with the WHO's recommendation of breastfeeding for at least two years. Breast milk continues to provide essential nutrients and antibodies that help protect the child from infections and diseases. Prolonged breastfeeding also supports the child's dental and jaw development.

## Why Each Wrong Option is Incorrect
* **Option A:** is too early and does not align with the WHO's recommendation of at least two years of breastfeeding.
* **Option B:** might seem reasonable but still falls short of the recommended duration of at least two years.
* **Option D:** exceeds the generally recommended duration and may not be practical or necessary for all mothers and children.

## Clinical Pearl / High-Yield Fact
A key point to remember is that exclusive breastfeeding is recommended for the first six months, and continued breastfeeding along with appropriate complementary foods is recommended for up to two years or beyond. This recommendation can vary based on individual circumstances and cultural practices.

## Correct Answer: B.